Fire detector



FIG. 1 is a perspective view of my fire detector showing a new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a (right and left hand) side elevational view thereof;

FIG. 4 is a top plan view thereof (the same with a bottom plan view); and,

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a fire detector, as shown and described. 